Restoring the chrome variatioons client, with a fix for browser_test failures caused by it.

The CLs that this is restoring are http://codereview.chromium.org/10343007 and http://codereview.chromium.org/10381021. 

BUG=121695
TEST=

Review URL: https://chromiumcodereview.appspot.com/10392007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@137662 0039d316-1c4b-4281-b951-d872f2087c98
15 files changed